ADVANCED PATHOPHYSIOLOGY
FINAL EXAM PREPARATION
QUESTIONS AND ANSWERS
1. A 55-year-old male presents with fatigue and dyspnea. Lab results show a hemoglobin of 8
g/dL and a mean corpuscular volume (MCV) of 120 fL. Which condition is the most likely
cause?
A. Iron deficiency anemia
B. Thalassemia
C. Pernicious anemia
D. Anemia of chronic disease
Answer: C
Conceptual Explanation: An MCV over 100 fL indicates macrocytic anemia. Pernicious
anemia, caused by vitamin B12 deficiency, is a common macrocytic anemia. Iron deficiency
and thalassemia are microcytic (low MCV).
,2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary physiological
effect of Angiotensin II?
A. Vasodilation and decreased heart rate
B. Systemic vasoconstriction and stimulation of aldosterone release
C. Increased excretion of sodium by the kidneys
D. Inhibition of ADH secretion
Answer: B
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor that increases
systemic vascular resistance and stimulates the adrenal cortex to release aldosterone,
leading to sodium and water retention.
3. Which type of hypersensitivity reaction is mediated by T-lymphocytes and occurs 48 to 72
hours after exposure to an antigen?
A. Type I (Immediate)
B. Type II (Cytotoxic)
C. Type III (Immune Complex)
D. Type IV (Delayed)
Answer: D
, Conceptual Explanation: Type IV hypersensitivity is cell-mediated (T-cells) and delayed,
such as the tuberculin skin test or contact dermatitis. Types I, II, and III are antibody-
mediated.
4. What is the pathophysiological hallmark of Multiple Sclerosis (MS)?
A. Degeneration of dopaminergic neurons in the basal ganglia
B. Deposition of amyloid-beta plaques in the cerebral cortex
C. Demyelination of the central nervous system axons
D. Destruction of acetylcholine receptors at the neuromuscular junction
Answer: C
Conceptual Explanation: MS is an autoimmune disorder characterized by inflammation
and demyelination of the central nervous system (brain and spinal cord).
5. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying cause?
A. Increased intestinal absorption of calcium
B. Failure of the kidneys to activate Vitamin D
C. Hypophosphatemia
D. Excessive secretion of calcitonin
Answer: B
FINAL EXAM PREPARATION
QUESTIONS AND ANSWERS
1. A 55-year-old male presents with fatigue and dyspnea. Lab results show a hemoglobin of 8
g/dL and a mean corpuscular volume (MCV) of 120 fL. Which condition is the most likely
cause?
A. Iron deficiency anemia
B. Thalassemia
C. Pernicious anemia
D. Anemia of chronic disease
Answer: C
Conceptual Explanation: An MCV over 100 fL indicates macrocytic anemia. Pernicious
anemia, caused by vitamin B12 deficiency, is a common macrocytic anemia. Iron deficiency
and thalassemia are microcytic (low MCV).
,2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary physiological
effect of Angiotensin II?
A. Vasodilation and decreased heart rate
B. Systemic vasoconstriction and stimulation of aldosterone release
C. Increased excretion of sodium by the kidneys
D. Inhibition of ADH secretion
Answer: B
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor that increases
systemic vascular resistance and stimulates the adrenal cortex to release aldosterone,
leading to sodium and water retention.
3. Which type of hypersensitivity reaction is mediated by T-lymphocytes and occurs 48 to 72
hours after exposure to an antigen?
A. Type I (Immediate)
B. Type II (Cytotoxic)
C. Type III (Immune Complex)
D. Type IV (Delayed)
Answer: D
, Conceptual Explanation: Type IV hypersensitivity is cell-mediated (T-cells) and delayed,
such as the tuberculin skin test or contact dermatitis. Types I, II, and III are antibody-
mediated.
4. What is the pathophysiological hallmark of Multiple Sclerosis (MS)?
A. Degeneration of dopaminergic neurons in the basal ganglia
B. Deposition of amyloid-beta plaques in the cerebral cortex
C. Demyelination of the central nervous system axons
D. Destruction of acetylcholine receptors at the neuromuscular junction
Answer: C
Conceptual Explanation: MS is an autoimmune disorder characterized by inflammation
and demyelination of the central nervous system (brain and spinal cord).
5. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying cause?
A. Increased intestinal absorption of calcium
B. Failure of the kidneys to activate Vitamin D
C. Hypophosphatemia
D. Excessive secretion of calcitonin
Answer: B
